Paper container for greaselike substances



w. L. WRIGHT.

PAPER CONTAINER FOR GREASE LIKE SUBSTANCES? APPLICATION FILED JUNE 20,1918.

1,417,707. 7 Pa fiented. May 30, 1922.

2 SHEETS SHEET 1.

w. L. WRIGHT PAPER CONTAINER FOR GREASE LIKE SUBSTANCES.

APPLICATION FILED JUNE 20,1918.

Patented May 30, 1922.

'2 SHEETS-SHEET 2.

UNITED STATES TENT, OFFICE;

l i 1 WILIBUR L. WRIGHT, OF FULTON, NEWIYORK, ASSIGNOR'TO SEALRIGHT 60., INCL,

' OF FULTON, NEW YORK, A. CORPORATION OF NEW YORK.

PAPER CONTAINER .roa GREASELIKE SUBSTANCES.

T 0 all wit-0m it concern.

Be it known that I, WILBUR L. WRIGIrr, a

citizen of the United States, and resident of Fulton, county. of Oswego, State of -New York, have invented certain new and useful Improvements in and Relating to Paper Conta1ners for Greaselike Substances, of which the following is a specification.

This invention relates to certain improvements in paper containers for grease-like products; and the objects and nature of the invention will be readily understood by those skilled in the art in the light of the follow- 1ng explanation of the accompanying drawings illustrating what I now believe ,to be the preferred mechanical expressions or embodiments of the invention from among other forms, constructions and arrangements within the spirit and scope thereof.

" It has been established, that certain grease- 'like substances such as-oils and fats, can be preserved against becoming rancid and kept sweet and in the desired condition forlonger lengths of time when packed in paper containers than when packed in tin' or other containers formed of metals that are subject to chemical action when in contact wit such grease-like substances.

A considerable percentage of tin cans in which grease-like substances are packed permits seepage of the-contents to the outer surfaces of the cans rendering it exceedingly difiicult to cause labels to adhere to and remain on the cans and causing discoloration of labels and spoiling the appearance of the CBJIS.

cles and problems have, heretofore, stood in the way of the successful commercial produc tion and general use of paper container or cans for packing and shipping grease-1i e substances such as oils and fats.

A paper can for this purposemust be. of such construction as to permit "economical quantity production thereof by -machinery and consequent sale at a comparatively low price; such canmust be of durable and somewhat flexible structure to withstand the stresses and strains of handling in shipment and transit-5 must be-of such structure as to permit pasting of exposed labels thereon and provide for the protection of such labels from thegrease-like contents of the cans to prei Specification of Letters Patent. Patented 1922.

Application filed June 20, 1918. Serial No. 240,935, r

vent discoloration of the labels, and said cans must provide barriers against passage of grease to reduce to the minimum seepage v of the grease-like contents of the cans 'to. the

outer or exposed surfaces thereof, and'furthermore such cans must be more or less pleasing 1n exterior appearance, not freaklike in appearance or construction, but of such formation as not to require diflicult operations and consequent expert or skilled me chanics---0r employees in packing the cans 7 thereof at the packing plant for storing and shipment.

It is an object'of my invention to provide a paper can for packing grease-like s' ub- 1 stances that will meet the foregolng require 'ments.

and completing the assembly and sealing rangements as more fully and particularly set forth and specified hereinafter.

Referring to the accompanying draw-' ings:--

Fi .'1, is a sectional perspective of an assemb ed sealed vention. v

Fig. 1 is a longitudinal section of the vcan paper can embodyingv my in-' of Fig. 1 before being completely assembled,

filled and sealed. 4

. Figs. 2, 3 and 4, are longitudlnalsectlons of assembled sealedpaper cans of modified constructions. L, l p The body of the cylindrical can of F gs. 1 and 1f embodies outer and inner separatelyformed cylindrical tubes or barrels '1, 2,

usually composed of spirally wound and pasted sheets or hands of paper such as producedby paper tube winding'machlnery.

However, I do not wish to limit myself to such formation of the inner and outer plies or.

barrels of the" can body.

The inner tube or barrel 2, is relatlvely short inlength and is snuglyfitted, and if .so

desired cemented within the outerftube 1 midway between the ends thereof, to form the annular shoulders or seats'3, within and 1 at both ends of the can body, and each spaced a substantial distance from the ad acent projecting end ofthe outer tube of thebody.

When this can is'closed or sealed, after I being filled with a grease-like product such as oil or fat, cireularpaper disks-flclosely 30 Y fiat outer end walls of the caps or covers 6.

I fit within the extended ends of the outer tube and against the shoulders 3 formed by the end edges of the inner tube, and are thus tightly held and sealed by the annular looking crimps 5 tightly fittin the outer faces of the disks and formed by t e projecting ends of the outer tube under the operation of a suitable crimping or spinning head or tool. This tool doubles the straight projecting ends- ,disks 4 are inset.

. 4" surface of the can body.';

of the outer tube inwardly and downwardly or .backwardly and compresses the same against the closing disks 4 to form permanent locking crimps tightly se ling the-end disks against said shoulders. The crimps thus form heavy protecting annular rims 5 at the ends of the body so that the end closures or Cylindrical paper caps or protectingcovers 6 fit longitudinally onto the body and over the ends. thereof. These end caps snu ly and exteriorly fit the body and exten substantial distances longitudinally thereof and entirely enclose ,the body ends and closures.

By reasonof the inset of the closure disks 4, within the body ends,-the closed ends of the caps are spaced substantial distancesfrom said disks and intervening closed chambers a, are formedfiwithin the locking crimps 5 and between said disks 4 and th The filled sealed can is exterierly surrounded bya cylindrical sheet 7 forming the cylindrical exposed surface of the can.

This sheet surrounds the cylindrical flanges of the caps 6 the other, and heme and stretches from one cap to the portion: of the sheet intervening between the flanges of the two caps is spaced outwardly from contact with the'outer surface of the can body that intervenes between the caps. The space or closed, hamber b is thus formed between sheet 7 and the adjacent The sheet 7 is secured to the can by suitable adhesive at 8 between the outer surfaces of the cap flanges andthe inner surface of the end portions of the sheet. This sheet 7 is preferably composed of paper constituting the can label and is folded or stretched tightly around the and secured as described, with its edges overlap+ and ping and secured together, and it is this .55 label of the filled, sealed completed packthat I particularly desire to protect guard from contact with the grease-like product within-the can.

' I The container'manufacturer produces the can as shown for instanceby Fig. 1, and supplies the same thus formed to the. packer or shipper of grease-like substances, with i the necessary .end caps or covers 6, and if "need" be, with the sheets,'=. that. in the filled completed package, form the labels 7,

The can manufacturer produces the min body and inserts the bottom closure disk 4 and locks thesame by forming the bottom locking crimp 5' to close and seal the-bottom of the can, but leaves thev projecting upper end 5 of the outer tube 0 the body in its original straight cylindrical form, and if so desired inserts the u per disk 4 therein for shipping so that 1t can be readily removed when the can is to be filled through its open upper end,

The can manufacturer treats the surfaces- -of closure disks 4, (usually both surfaces and the edges thereof) the inner surfaces of slip caps or covers 6;. the inner surfaces of the can bodies, and usually thein'ner surfaces of the label sheets 7, to render the same approximately grease proof.

Various chemicals and processes might be used and followed for this purpose to reduce to the minimum possibility of the paper absorbing oils and like greases orpermite ting seepage therethrough by'capillary action or otherwise, as will befreadily understood byathose skilled .inthe art'."." I The. can as shown by. Fig. 1, (with or without the upper disks-4, in the otherwise open tops of the cans) and duly rendered app-roxlmately grease proof, is thus sold to the trade with the appropriate-exterior slip. caps or covers.

' The packer of oils and other grease-like substances, then fills these cansthrough the open upper ends thereof, and when filled, inserts the disks 4' in th open upper ends thereof, and by appropriate crimping implements, spins down the dry paper projecting ends 5 to lock the top disks'4 and seal the upper ends of thecans, .foiming the top locking crimps 5 as before described. The "grease-proofed comparatively-heavy snugly-fitting end-cushioning and protecting caps or covers 6 are. then placed on the can, and the label or sheet 7 is finally applied and secured as hereinbefore described, and the package is completed, sealed, and ready for storage or transit. i 3 1 A more or less effective barrier against passage or seepage of oils andgreases directly through the paper walls, is estabilshed by the grease propfing process which is deslgned to coat the paper surfaces orf'impregnate the paper withsubstancesinsoluble 1n the oils or greases to bepacked or to otherwise render the paper approximately roof against passage or seepage of f such substance. a 4 The can of Fig. :1, is preferably internally subjected to such grease proof treat ment in anefi'ortto filland seal the angle or corner where-the bottom disk 4 and inner tube 2 meet to prevent'so far as-possibleoutward seepage of oil or gre se under the end edge 3' of the inn tube. "This also proat this joint to the minimum. J

walls and bottom joints of all the bodies of a series of paper cans may not have become thoroughly grease proofed,and as the-joints at the upper ends of the cans cannot be efiec-. tively grease proof either before or after the cans are filled, it is advisable to provide additional mechanical or structural barriers against seepage of grease to the exterior label or outer surface ofthe can.

The exterior slip caps or covers 6 not only cushion and protect the filled can against damage by rough treatment during transportation and handling, but also provide such structural barriers inasmuch as said caps are separated from the closure disks 4, by air spaces a, and also said caps support the label 7 from contact with the walls of the, body; Even if some portion of the label is, during handling of the package, pressed into engagement with the outer surface of tube 1 of the body, said label will be pro-' tected by its grease proofed inner surface in the eventthat grease in some manner had worked to some portion of the'outer surface of said tube.

It is of course Within my invention to extend either or both ends of the label or sheet 7, beyondthe exterior end caps 6, so that the extended ends-of the sheet can be crushed or folded in at either the interior or atthe exterior of the cap endsand cemented in posiprotecting and cushioning means.

The sealed grease or oil package can be opened in any suitable manner. For instance, the label can be cut or broken and the upper exterior cap 6-can then be forced off thereby exposing the inset top closure disk 4. This disk can then be cut out around the circle of the locking crimp 5, and removed, so that free access can be had .to semisolid greases such as butter, lard, or substitutes thereof, or the like, or where the greases are in liquid form, as oil,- suitable openings can be formed in the upper disk 4 to permit pouring of the liquid. I

In Fig.2, I show the can or closure-o Fig. 1, with the exterior sheet or label 7 fitting the exterior surfaces of the outer tube' 1 of the can body (instead of being secured. to the outer cylindrical surfaces of the end caps) with the ends of the label embraced and covered by the end caps. Either or both ends of this label can be extended and crushed or folded inwardly into the spaces within the locking crimps and onto the inset disks 4, and thus confined within and by the exterior end caps. If so desired, the extend-.

ed infolded ends of the label can be cemented to the end'closures 4.

In. Fig. 2, I show the extended, label en ds '7 "'thus folded in and secured down on and In this construction, the label is protected against grease by the grease proof surfaces and by the mechanical or structural barriers.

Cans of this formation can be furnished or sold by the can manufacturer with the label in place on the body and with the upper end openas before explained in describing .Fig. 1. In fact, both the structures of Figs. 1 and 2 can be supplied with the exterior caps in normal position on thelower ends of the body and removably fitted on the extended upper ends 5 of the body.

' In Fig. 3 of the drawings, I show a'closed sealed package whereinthe cylindrical body Wall is composed of a single paper tube l without the inner barrel forming shoulders 3.

The bottom closure of this can is formed by inner and outer sealing disks 1*, 1. The outer disk 1 being flanged and secured by lock crimp- 1 formed by rolling or crimping togetherthe lower end of the tube and the disk flange; This inner andbuter disk bottom closure is disclosed and claimed by my Patent No. 1,235,750, Aug. 7; 1917'. This tube I is formed of extra length to provide the extended upper end necessary to form the top locking crimp 5' that secures the flat top closure disk 4*. This can is supplied-by the canmanufacturer to the trade or packer, with its upper end open, and accompanied by top disk 4, exterior caps 6 and if so desired, the label 7. Thei can as thus produced by the manufacturer is interiorlygrease proofed, as hereinbefore described.

The disk 4*, the end caps and the label are also grease proof. The label can be secured to the can body as in Fig. 2, althoughI prefer to secure the same as in Fig. 1, after the can has been filled.

This can of Fig. 3 isintended for semisolid or non-fluid greases, such as lard, butter, or substitutes therefor. After the can has been filled with such non-fluid substance, the disk 4 is inserted in the top of the can and rests on and is supported by the semisolid contents while the crimping or spinning head is crimping down the upper end of the body to form the locking crimp 5. After, the can has thus be 11 closed, the end caps are applied and the abel afiixedr In the grease package of Fig. 3, I show exterior end'slip caps 6 having inset end walls. These caps are composed of paper t es or shells and flanged disks, the tube en and disk flange being secured together by a lock crimp as will be understood b those skilled in the art. In this package, show the ends of the labelextended and covering the exteriorend caps 6? and preferably folded into'th'e inset ends of'said caps, at 7, and if so desired secured to the end walls thereof. \n

i In Fig. 4, I show one e d of the package of I Fig.1, withthe exception that end. caps 6 covers one or both end caps ends, cushioning flanged (of the construction shown by Fig. 3% are employed, and the grease-proofed abe 7 is and extends over and and is pressed at 7 into the inset ends thereof.

I employ the term grease herein'in a broad generic sense to includeoils, fats and gre cemented to the tube 1 changes, modifiases. t is evident that various beresorted to cations" and variations might without departing from the spirit and scope fitting the ends of said-can and covering said closures so as to form grease-barriers, and a paper sheet extending around and ofiset from said can to form an intervening air space and fittin and secured-to the outer surfaces of the an es of said caps.

2. A grease pac ge embodying a surrounding exterior label sheet protected by grease barriers from discoloration by see age of grease from the interior of the pac age, said ackage consisting of a paper material can aving sealed closures at both ends and projecting end flanges, and slip caps exteriorly fitting both ends of the can and. 'coverin said closures so as tially as descri a r WILBURL. WRIGHT to cushion the f I can en s and form grease barriers, substan p 

